SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60cd0ef539d54b5fb299ee435a7bf3785d3b986e60c547f13f1442f06fd8ac71' 
  AND token = 'uB+47stqnPgkgS5uvHpbFAzvcNxXPRqNEJ7VdfqmZXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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