SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd69697b5e4f3ecdcd26a5d4bb48eeda3377395a3f5af2b871679f09dc90a95b3' 
  AND token = 'U/LmBqBXqmZO5YqIFoqMUKZW83Jn7yYFYOK15hIURPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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