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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '2769b14c7948b992a7343b5b5a4e777d54b7e531b51e544812ec2b4f53ef01e8' 
  AND token = 'AevEfh5Esv7AKLBRX2pobv9+6b6k/F5HbVx6a8IYo/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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