Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe73b96659fe6c4de1c30ebbae0cd33e7827189d86a99403656e7e88d8a4afb1' 
  AND token = 'zupsZCAHAUuXSQzfCIW7xe+gaB+BuvLnDDIdwe+KieE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00154

JSON explain

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