Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f69c61f16eb2ac194a6b4842ce512bed04635fdac1a8136c0feb2ee1a605352' 
  AND token = 'V95LsUmWuAIlCvjDv26T5kApAscgi/dev2GWO2HyZpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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