Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5c9b3f50298a5a9c25cdec3106cb2a14baa8097bee76efd12bb0cc30775e1ea' 
  AND token = 'FSovjiCUUD42Ur/sDJvIa1VAuzT7P+P48isjndaLU0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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