Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8072ec7461c376ccbacc7a1ced85095c1c9b619750688c1d51d180f30154500' 
  AND token = 'HK+ydN5p/1/n70wJ9zqxs4s2agro1wc61SqiCIy5WM4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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