Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0d89430ff20d4b8873a7b3011b178db4a0d0f2b12327c7516494117aa43faae' 
  AND token = 'mz/ysmpMKv/vZbSxcr4QPJIzaEJRYSJIJwtJAh4M/Uc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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