Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a87abe8bee988a89fbc24f86dab05990d46a449be7fd9b1161f6dd8900b0fac8' 
  AND token = 'IsTxOepP5Z4pmdXKVrjdMS62A/RwTXXVimcPckJmE9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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