Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b319d33915831fe8b8e82115fb2936b15f9b5090122464fe0453beb2c259f021' 
  AND token = '30mOFPg4sUMrgtQUJY9fQ+p818tq5ifmxb6HMcht7+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}