Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f3f3e6b0be9f3f775b6e8662cdeb965ccdcd39028e0c6ab9b62fcea1c756c7e' 
  AND token = '/chNYDT8xKd2kYPi73mpx7GX4hXWLO55LAdHF9qWkAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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