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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e10fe7322de790bb7228a16bd13b4955950deb4f767fcf00e3ad031b186d897' 
  AND token = 'KvuKV3nAq/PonoS+3q8HXITbLTl8zYxEWReYQx7yH6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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