Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c99133d5cf8da34612542739d75a8b6aaa4419ba932d7190e6782531d7bafa6' 
  AND token = '7NgUuXTp0F1LrpPZ42eu/GyXoR5ceT8D8H23Qg6ZvEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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