Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f42e0e097d290b8e204513edd196cc7eb407003aa927a5d206953d5273943a58' 
  AND token = '22u/bAnshHa1pOOZ3DDw5HHVPBchZc82GUZIhf/pNyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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