Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '492a36d7f2e818cc1e84aed0a29b2d3d5e223b2d0ebdba9e35756cdfb7c995f1' 
  AND token = 'IX8sfU9i3LOhufrRp95o8XP0dKi0ZsFJi4Marg+fDyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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