Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61ba6f750a80e2750968a15e0b3d3ac49233a9672d81ef34346b1b228cbf93a5' 
  AND token = 'PWxPyMMOZDr/57ge6Y+ywWe9chINhUp2+bqhErwDLmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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