Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84887e21fee6cc4c59a40753c182e65b7109f5e4a0c730d5b126fc4a90c530cd' 
  AND token = '5FD4SUxyU5mY8tZsvFwV7z0gS6IuypZFLJYBaMODN2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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