Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67f00b972d2820195dab33fabef062b3080a5585c8357b934a8b86af05abc96d' 
  AND token = '7I4G5FqpZillI77AznR2CN+0eSqv6G7LRBcaSjng2aU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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