Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b7ecaf06af25c0ebe7429e2f4ce284968fa0d6563260d3578f67c148ae75393' 
  AND token = 'EdejWJomYpufhnchPKx49pbvkU3urgyzG9mychTffn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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