Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e3f455e40012a960fea895282ee133728515d433518ff5e5834ee78508b8dc0' 
  AND token = 'liN+yViy/TjEtn6ade/VGiTjTTOE0e6m8xywgU4p1Tc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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