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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0205fd7efb8b335f96c7aeeb0a1ad94568938c9ff7fe462f87efeba54cb282dd' 
  AND token = 'TAh8GNtGefdUwbiuVep9pYQGyai7JiDhfyogEdssB6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00078

JSON explain

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