Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e91c9e13e3d5e5377324f61526184001a5905a076640d64ab84c4590e65de19' 
  AND token = 'dOXAzdijlIp9B/lP9OLl9XvBmaTTfH9NMYxst2d+guQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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