Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4eb819994d0c996e57bf7d3bdac657da5b313418454a2314ffedb29463ecd565' 
  AND token = '2DB4V3K9Eg0U46e3uJlcoENm+06Z8n4NMeYSOV+Fimo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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