Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6152b54bf7c42226659eacde5f4659d68528176fc2d39518c0416ba8ac6e41a7' 
  AND token = 'R5ulRrgEqSB3zyld5VV98I/LXHCv2pLGkLWCk/cFeTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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