Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e7da020678d7c4ae1190781ef851974f4c67bda9aa62b1d2b0784c4fd66c9e7' 
  AND token = 'LSBnHTDibfce1XbBV36wHRKnEiIRvt0mkKThJ/itD2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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