Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02a12bb96dd21ba869c67f205cf68a17b7473dc10602c1592e27353b35c80674' 
  AND token = 'YQiLAL/PIb07nQNB4V0xmfq1vsp7e09WeK4rZa5XZpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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