Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12dcc76188cdbe454a4c466cdcc364d9913d13d730a0e7ae82183965db0f98a3' 
  AND token = '1R/1hvXGNxGXsKGdInyiNPrOkHi/X13rB+GB9mmPZdA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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