Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92ddb3bd48ed2a8431233b148c100d249515b4959ed718b19d09c029fc740592' 
  AND token = 'P05xjDt0ji4Yq29HNF/wqFRVobT88xatsBdDePZyA3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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