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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ace91ed904767cacae949975bff6eab3891f4ed62f3cf5f212b77ac668f3f07' 
  AND token = 'HAYv7cdc0uS9xS4ByvmfjZvjmzXTOr/Ywfr2lbH7Puk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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