Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f97b2c4a39a940b477a20124cc88f446e3947b196a4d193f161c941ffc16f133' 
  AND token = 'h3dpNebZ6RCih9rEuKIXT3uIWZB97hS4HAg5Fg1kCFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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