Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74419a4baebb728f5e399836a72442aeb83d83734eae84e60c69665b508e0ef3' 
  AND token = 'Z1d74/qWQToHkrWrXBmm9tVj4RF0tuTsUiDmlZHw1WE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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