Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbfc0f90830f228d08ebed35d253277a1b104fa5ecb420423b0f0113436a69bf' 
  AND token = 'OXXpl8OVvi4INrUk49JCQROVB+llqb5urdDzwJ+bWQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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