Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8c665ac7d03d8c8d69d2bbc5b1756c00616f90b7b12146ccb70f221efb430af1' 
  AND token = 'eHGHgFM7oZPJpqfXhP07plfyorAbr9+b2sL2kPAiQFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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