Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26d7c1f11c15627294d8df97878d141c449ef1bf0ba2a0327dd46ab69d8a7162' 
  AND token = 'u0/Wtuk0vLOEVwkUtbQj3h2UrYnt16Z4wNkolgpGNps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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