Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5d046b99e0f8417bd4212b38b63232a7d2e032765720f16e1a3a26ebd618e67' 
  AND token = 'YlHUh7t3BlXEoc1Mb/T+3qBNRZgPErEWFx+MIfNh0qc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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