Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '35b716d319c4efe8a0e4d2e4bf6e9fecb7abf4b95e366702cac155de0567b496' 
  AND token = 'QpxTcGrQhjthYZZ0MOSZ1HHr3FSygG7ogsFawxFa0Sw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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