Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e6676e55641139e9faa45ae296117b7ac638e53a50c65c4a0eef3b0decdcaae' 
  AND token = 'vzZiNdiiKk/onylLBZdxqAtt/YXYEiY7QFAvQnWNaNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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