SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b714f118a89e408d977f62d297b2a57bc8467bd30d50e14fd77ec3057b91ec56' 
  AND token = '8Hr/vKhWl0tecYJEUY4ojwkKbvVQVIpW66skX6ZUwt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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