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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c32909f035c2baa60598262930302cee1d1e9be0d0ab0bfbdc0b17e2e5eb173b' 
  AND token = 'wBwdZd6P1PaZYuyyKvfMc1zrmMfN4bij1Gnft0tGhgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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