Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdb71446c5acc2d31a75508f98bf76de853c052a38364d0569180c6a1737a147' 
  AND token = '/iAqS3wW6HyEic7k6/m2OjCpXmR85ifvFduROBtdNHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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