Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cff7a1c742e9b7b1e02cf659d221f4d010539a6cd4115fca10a0901a9b6b92e' 
  AND token = '52OhbmQjqOa9GDELrMU9u/n/TVbErwQ6fYjnrZDdy+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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