Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e37af0898760de2684d20a146c6d4e26c4a110c2b471009f584dbc0b7769b9ff' 
  AND token = 'NZJuX2PtsbMj6qaYw9ps09qewKzetUn2ieAZ/EftDyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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