Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ea48261e22d87199453728d798c89f30c26c9cdee4c944e6ce09a115ac3a805' 
  AND token = 'FSiBUyWfV4jXzKM2HpcGu+oqWf6NeAesXFnZ3e0mKps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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