Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2664cdeb77d79a2ac954172c527535fa37f9a41738b91010c1b6945a0d38c8b0' 
  AND token = 'H/TfcerG1lSEf7Eww1srbvdj19oRE+XRik9xdn8QR2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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