Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd413f5ad637c1bb8840f5a580d3ad6c9f9b18effaf61d8d1c8b6ccf113124868' 
  AND token = 'vShcen9OoHjJnO+2H51LzCs+PucrjE59OeBWkoJe4vQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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