Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83f96da78a25c23bf9bccd9406e324bd4fa843f2ea6f2aadde04edebcdb0590d' 
  AND token = 'AAIW3STRlfnqxX0qrsdxJik4ogxTYw28WhjGGidw/8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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