SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2367bb3a556e19c8951c8cf5170002257980f44bf1dfcc1d922e90d748b3f7ed' 
  AND token = 'ybazrYJ4qVqLEXVFk2hCJsxEwpJ+ACPYBM5wDYFWfFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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