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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba88487a5e52fa3a79d86cbe14275bc1169ff42420dae7c0c5b6bd740cecb00a' 
  AND token = 'wZYeqvgeDs780TCl8r7kxww2s/dQcctrhDKwKO04zcA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}