Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b87f4acccb2e3f126cba6d09032b501d6e7e9c8affbbf6afa8153cf4bfca99bc' 
  AND token = 'ZTRH2szCFLFKNpcl2plsBBpBdIJo+CqCjQnos2F+cSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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