Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7f2eab3319a16e6a1a0da5d106b590f3402465ec068a90766aad1e20041469cf' 
  AND token = 'lIQwRhYqiHJGdc8wreIQWmrVXnHd/P4s3AtxPDbpep0=' 
  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"
    }
  }
}