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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '94a690cfaaf8ade0fb92b0183ff88b854d80441d92004330e0eb921b192cfb29' 
  AND token = 'Xz9EshzLm1NVzv5FNCEdDiq3dpr7TI/WQh8KP1cI/oU=' 
  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"
    }
  }
}