Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '198a9ff3102d26274c96b8292d104f73b81676661f19a192fec63733a6c11f7e' 
  AND token = '4UzjIDKp1YuQ8sCvNxe6RJApSD7C3otp7CGa/moRqSQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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