Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6e7efdb67cba3f45a9dd2b00692141ab203b5369c5303dcb42a52e25fc918635' 
  AND token = 'H5t997W6XF0jNZnrxLrhJt4d2cvm/u2ZnqVDtdU1tLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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