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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a68c7757341c5e302e6296b9f945fa22f3c82ae4452cd1d2e9edb107104ce374' 
  AND token = 'l2h+XbjB2Ikulm8e4OcYDJMGI9+y7O/IIWJ28wdiDfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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