Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07dbf6a76a9c8cdbde377f9dc6f5847570bfee81635f6060e8e7a0967bb37637' 
  AND token = 'BRVUGSqG4XbB7k7tV3Nqf7bRTAYlruw8PxgSH6K02PA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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