Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2273f928848c9f500e25576e9f9f18aaf37875185fe981daf1284e5dd2814963' 
  AND token = 'SCi/XNae1vRE7PdtsW7yyPvUST70FInIm1qqyt++5E4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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