Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11cd69dafe8d4c9b5f0fdc2e75a1a055acfa52a42689739eb3bbc5960c70254a' 
  AND token = 'zEYSlYUQOfQZl6XgLahxpU7h5/NW6MwSInydO9GM4Gs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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