Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bab1b4613ee429e8dc42fac822d26ce382c627522eedbd58cf847f3453d80a2b' 
  AND token = 'Qiw2LyAtpEu9uhHiI4b49W/ovLb6qTn3EQBzipn4BZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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