Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2154caa8a6bdac316f41001efe631680ad5a1aac3fea94df613af014b891704' 
  AND token = '6FWUz22V1NqmeDz3BVjaJp/s0OHmcYKMLe6kl6bP1SQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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