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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd8ee2e4bbcd4944287c731dec06cb67cd99466095a1f54288c3b51f0741ebc9f' 
  AND token = 'b91s94mozctApIt9hcoLX7OtAEJGiOmsRlLNo8X2VLg=' 
  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"
    }
  }
}