Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '969741b17e8dca34b1090e9ef3fa2204f1d37bcaaac3718f276ad8bfe1aeed38' 
  AND token = 'EUvzQK0Lct/zzLt0ZKsSAGFjeJUjxIpA4s9veJXl744=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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