Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33ed2f505f91d5c5e64bd7686ec4ea0e0cd06d3be9a9878b420e49b914eceb15' 
  AND token = 'BUTgNA8ItwWjB9frhmKcq80vMGW/PFibj+jzaygF/N0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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