Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd124a26b5077830edc62051f9a1fa424c052f5f83f486028b5f680d8c549a53' 
  AND token = 'r3gVwbvq1/R3mbrl6qTy443Dk8bO2ZGODpxc2gKN0CY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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