Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6043612d9c8cc28aa8f259c4497dec8c71a40e6074cb42da0e99890e3c4ebd3' 
  AND token = 'CXTryQ4R/G3m+nJvv/MTfAVYwX4fTY9kpxpFBIgQnjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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