Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da9a41fe2dcccb4dd468c6aa49aa3a6d75cc6dee5a93dd5392e3aa4b2b43a168' 
  AND token = 'Ih4JhU4oO1VA7dhF8uLSp7qVqpR3sivpf0ol51Lb9ok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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