Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4331cc6655ef44a67f42fc901db3b93f73f443220e3bbecc5995dbfc6cea7bfb' 
  AND token = 'W6TmCVbotaMJgcVWNydDMlvx2d+n21EEngzR+hqMK8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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