Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ee66bb64d8e190df825183373ee1ed9103d8f7f481f3456fa98c2bed50a386c' 
  AND token = 'kZurIMqEfpwjp4cIBBw37ZW2qkksUc4G0BiYK3YNVxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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