Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd954e09fb5b2d34cbf653b7fb6ebc653c3434d289e631448f0fd95be6f2b1335' 
  AND token = 'Nppc/GuvBfoDq1ccbCNF1GPT4mKx5WNfrAIAAXgjYfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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