SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0d2a23fb38d1fbde371242b1f65900d43906daf9c26aaa9ace39f57477e263c9' 
  AND token = 'DDQG+Lwq5SVfP2KLJdZLDGXKnajZE7Vvx+HfZQiaaMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00007

JSON explain

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