Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0eec10b082ce447402d218c9913b20c1074bd170a237fcc9b12ae1d9dd9800b8' 
  AND token = '0EIkqQCKhhNjTqtIN1Y8ZmKxIRoj5RI7FGweLMeV2QM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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