Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd80aaf8787851faba7a3a2bf9a438cc437a035b5e5f748c7040d629258b5bef' 
  AND token = 'Zk5H68+VA8PBaDuz3kLXvkU71lNeB3JbQgJkHNK5TKY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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