Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6a3ead4792db5006af133a5f7aa6b75d516ba9a7256d215414b6e6fa17e12379' 
  AND token = '9je/B+2/AGP7aWByQvVCHRQCMSRkSEVNs/vUClwC+Xs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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