Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fd43158faa45ce3c1e735081c04be03bca5fb20acbcde817e79b8d088d3e68b' 
  AND token = 'MRD8Goo9H1X+CpLuPBtpNRNQiMNR2Ty4btfyLIrh6uE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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