Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08b88f29b5a5b98d0c768c8678f76419075f8e8df1a97e030edf32bfb4b7e685' 
  AND token = 'g8x8btYKGZRhriRNqSs4S+Qg9m41uxjjeNYaxkQqrSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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