SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95812901df3cf3f9c8ae83466fd42da5969c9bb9634f3e80a872e6e89f017642' 
  AND token = 'sN0IgIFDzZ2/kM7n4+nWZOXfvhVaQqvGeyzZ8T5kK2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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