Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5a829cff2d27897dde676a084b182d8d1ec9bdedec3fc9473f7041b8b9611fd7' 
  AND token = 'rm2u6Sed2bxxj6Gu4fyF88xMdycs9r0ie1tPXZ6rB48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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