Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10589f6110ffec6c978774e5ed02b4d111e0b61202a25158ada05cdd1c9dc73a' 
  AND token = '96YxWTviE6iRQSqnVJYAuy7Hrq+te+XQAGJVs2XWalQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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