Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15299e49c6b2efbdb57b640c9eba1e8749243434091f5419b7f4294664c2422c' 
  AND token = 'jr3OtZ3ZhDFOpV7ZaadD2323DsuVPicpxPMYbxPuago=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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