Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d57ce6b4c81700eac53d71f49898790435f0956f0b209af1de058b69003ea20' 
  AND token = 'Dwh6/yrMASC3u41VmMwCSs+aImyJSW1PxYO0OuD6KkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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