SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '410c9ae4d6b93d9f6df1df4664de28dba8118ab96759af8bc8c2324f69749540' 
  AND token = '+1NVKrSxhEfB4zsR+g4sOJstl4LjyeLqC/umHK8Rn1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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