SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '34b1916baa11062a54cb4828adb08a11f59e61e30c1739fbe57a80dbb69cf98d' 
  AND token = 'JqU/KG1XppeVh0u7r3KNeIq6z5sMZT4xju92fWFL43g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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