Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c1a9bd4318463c24358f0dd300b37f0bbfd01cbc0f43515a32c5003121d45f18' 
  AND token = '5eMyrLAiBRI2rv07Kk+y5YOe8plwTVP1o542qF28L6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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