Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c1158d4c397d00b5e42e8b0c029fe417effe746b1f5598a527abf3399982097' 
  AND token = 'KM6L3riV2CNw16toOyEPmJn9334bRblS1e9L0ISqzOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}