Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7785fae0373aa210bc2ddfcb84e6419b84d3a813cf8b0ccf301fb861e45da37a' 
  AND token = 'AsLSnq6wZBngXAbHehzofEjxfc7Tt0djWyKr7+NY0PM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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