Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9954595553f2f6744f920524c8489cd26b37da2698e3fba70d28bb5aedc19a2' 
  AND token = 'VKKmsrEOcebSJLYuBF0nPOd98uEYo6VYifapJeZIM9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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