Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9947c73185d9974c0231efa00472bbc0a98cde452812cd784285975331d2b177' 
  AND token = 'NbXlXLLN/OGW9OLpBjIIj0+ory+ht6XYVwH2hfJO7p8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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