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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd6a57dcb2e1e8527f3074ede5b3856dc0107269b869fcda031056323e0f13df6' 
  AND token = '/heDfHqtQcupTA1JmZql5a6neN0WK6edglsaqu1cpbU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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