Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92e9ba07a44f33e8fe7198470aca1c5bb908dd90bcc2b51d6b6e82eb9a085a80' 
  AND token = 'x8Y79QKamvkEDUqxHcJPeyeLtIHwkH9GB2mnRGQrkDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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